Physics, 26.09.2021 14:00, fffcc8759

Lab: Acceleration of a Cart on a Track PART I Make predictions about the position, velocity, and acceleration of a cart in different scenarios.

If the air track is perfectly level, what do you think will happen to the velocity of the cart as it slides along the track? Will it increase, decrease, or stay the same? Justify your answer.

If the air track is slightly tilted, what do you think will happen to the velocity of the cart as it slides down the track? Justify your answer.

If the mass of the cart is increased, how will the velocity at the bottom of the track for this more massive cart compare to the velocity at the bottom of the track for the lighter cart in the previous prediction? Justify your answer.

If the mass of the cart is restored to its original value, but the incline is increased, how will the velocity of the cart at the bottom of this more inclined track compare to the velocity of the cart at the bottom of the track for the lesser incline? Justify your answer.

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answered: Guest

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2 y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x | y

-2 | 2

0 | 8

2 | 14

Create a table of x and y values for the expression y/4=3/4x+2. use the x values of -2,0, and 2. i n

answered: Guest

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

answered: Guest

that would be because of both gravity and friction. so c

answered: Guest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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Lab: Acceleration of a Cart on a Track PART I Make predictions about the position, velocity, and a...